“While removing it we have also taken the opportunity to reduce the amount of plastic of any colour by removing trays from fruit and veg like apples, broccoli and pak choi.

“We are making progress all the time and are determined to maintain our momentum which is why we are now looking at ready meals and other products so we can achieve our aim of removing all black plastic from our own-label products by the end of 2019.”

Waitrose said it has reduced its use of packaging by nearly 50% since 2009, and disposable coffee cups have been removed from its stores.

The supermarket is replacing loose fruit and veg bags with compostable alternatives and removing 5p single-use carrier bags later this year.

By Christmas in 2020, Waitrose products including cards and crackers will either be glitter-free or made using an environmentally friendly alternative.